KR101730212B1

KR101730212B1 - Disposable diaper

Info

Publication number: KR101730212B1
Application number: KR1020127028127A
Authority: KR
Inventors: 카츠히코 스기야먀
Original assignee: 오지 네피아 가부시키가이샤; 오지 홀딩스 가부시키가이샤
Priority date: 2010-03-29
Filing date: 2011-03-29
Publication date: 2017-05-11
Also published as: RU2560313C2; CN102834081A; WO2011122604A1; RU2012145854A; JPWO2011122604A1; CN102834081B; KR20130029068A; MY157092A; JP5761179B2

Abstract

A stretchable and contractible portion 80 made of a stretchable nonwoven fabric is formed at least on a part of the retention portion of the wearer's crotch portion, The air-permeable sheet (82) is made of a water-repellent nonwoven fabric, and the air-permeable sheet (82) is formed in a part of the skin- Wherein the air passage forming sheet (82) and the stretchable and contractible portion (80) are laminated on the stretchable and contractible portion (80) and joined together by a joint portion (84) formed intermittently toward the body peripheral direction.

Description

Disposable diaper [0002]

The present invention relates to a disposable diaper.

Disposable diapers are absorbent articles that are mounted to be encapsulated around the waist of a wearer and have an absorbent body for absorbing and retaining excretion.

Therefore, when the diaper is worn, the moisture generated from the urine absorbed in the absorber, sweat, body fluids, and the like is stored in the inner space of the diaper (space formed between the skin of the wearer and the skin contact surface of the diaper) easy to do. This moisture is not preferable because it causes skin troubles such as dermatitis and causes an uncomfortable feeling such as stickiness.

Accordingly, various proposals have been made to improve the breathability of the diaper, particularly the breathability around the waist, in order to discharge the moisture staying in the inner space of the diaper to the outside of the diaper.

For example, an elastic member that elastically contracts in the waist circumferential direction is provided on the end flap around the waist of the front and back of the diaper, and a diaper is provided on the inner surface of the end flap so as to intermittently attach the breathable sweat- (See Patent Document 1).

It is also preferable that the outer covering sheet of the absorbent article is formed by the outer layer sheet, the inner layer sheet and the elastic members of a plurality of lines, and the outer layer sheet and the inner layer sheet are bonded to each other by a joint portion formed intermittently in the waist- While the elastic member is arranged so as not to pass through the joining portion (see Patent Documents 2 to 6).

In this pants-type absorbent article, the elastic member is not fixed to the outer-layer sheet and the inner-layer sheet. Further, a plurality of walls extending from the outer end portion of the waist portion to the inner end portion are formed all around the waist portion.

JP 3820043 B JP 2008-136793 A JP 2008-136794 A JP 2008-142316 A JP2008-142341A JP2008-142342A

The diaper disclosed in Patent Document 1 absorbs perspiration by the breathable sweat-absorbing sheet in contact with the wearer's skin and forms a space between the breathable sweat-absorbing sheet and the end flap. Therefore, it is considered that the purpose is to improve the air permeability in the stacking direction of the breathable sweat-absorbing sheet and the end flap by using the space.

However, the above-described structure has a problem in that it is not sufficient in terms of air permeability because it has a structure in which air permeable in the lamination direction of the breathable sweat-absorbent sheet and the end flap is formed. In other words, there was a problem in that the effect of air permeability was insufficient compared with a method of ventilating the skin around the waist from the gap between the skin of the wearer and the skin contact surface of the diaper using a chimney effect.

In the pants-type absorbent article disclosed in Patent Documents 2 to 6, the outer layer sheet and the inner layer sheet are contracted by the elastic member in the waist circumferential direction to form a plurality of lines of walls. It is also believed that the walls allow the inner space of the absorbent article to communicate with the outer space to improve air permeability. Therefore, it is possible to ventilate using a chimney effect from the gap between the wearer's skin around the waist and the skin contact surface of the diaper, so that higher air permeability can be expected compared with the diaper described in Patent Document 1. [

However, the above structure is a special structure in which elastic members are disposed so as not to intermittently join the outer sheet and the inner layer sheet. In this structure, the elastic member can be freely stretched without being constrained by either the outer sheet or the inner layer sheet. For example, even when an elastic member is arranged at an elongation of 300% at the time of manufacture, there may be a case where the elastic member is elongated beyond the elongation percentage of 300% locally at the time of use. That is, there are cases where the elastic member excessively elongates beyond the ideal elongation. Therefore, there is a problem that the elastic member, which is hard and tense, comes into contact with the skin through the inner-layer sheet, which may cause pain and discomfort. In addition, in order to obtain a special structure as seen from the foregoing, there is a problem that it is difficult to manufacture because of the necessity of a precise joining technique at the time of manufacturing.

DISCLOSURE OF THE INVENTION The present invention has been made in view of the problems of the prior art as described above, and it is intended to provide a disposable diaper which can be easily manufactured because of its good breathability and which can provide a comfortable fit.

Means for Solving the Problems The inventor of the present invention has made intensive studies to solve the problems of the prior art as described above. As a result, the present inventors have found that (1) at least a stretchable portion is formed so as to contract in the peripheral direction of the body, A sheet having a ventilation path formed of a water repellent nonwoven fabric is placed on the abutting surface, 3) a sheet having a ventilation path is laminated on the stretching portion, and the sheet having the ventilation path and the stretching portion are intermittently joined to the periphery of the trunk, The present invention has been accomplished on the basis of solving the above-described problems by forming a ventilation structure for improving air permeability. Specifically, according to the present invention, the following disposable diapers are provided.

[1] An absorbent article comprising a front waist portion and a back waist portion for wrapping around a wearer's body, and a crotch covering portion for covering the crotch of the wearer with an absorbent body disposed therebetween, wherein at least a stretchable portion made of a stretchable non- Wherein the stretchable and contractible portion is formed so as to contract in a circumferential direction of the body, a ventilation-formed sheet made of a water repellent nonwoven fabric is disposed on a part of the skin contacting surface of the posterior accommodating portion, Wherein the ventilation path forming sheet and the stretchable and contractible portion are joined by a joint portion formed intermittently toward the body peripheral direction, wherein the abutment portion is formed in a line shape extending in the longitudinal direction of the disposable diaper, And the distance between them is 2 to 50 m toward the width direction of the air-permeable sheet, The airtightly-formed sheet is deformed into a wavy shape by the contraction of the airtightly-formed sheet, so that the non-joined portion of the airtightly formed sheet and the stretchable and contractible portion other than the abutting portion is separated from the inner space and the outer space of the disposable diaper And a communicating ventilation passage is formed in the disposable diaper.

[2] An elastic member made of a stretchable nonwoven fabric is formed at least on a part of the front cannulated portion so that the stretchable and contractible portion is contracted in the body peripheral direction, and a part of the skin contacting surface of the front cannulated portion is formed by a ventilation made of a water- Wherein the sheet for air ventilation is laminated on the stretchable and contractible portion and the sheet for air ventilation and the stretchable and contractible portion are joined by the joint portion formed intermittently toward the circumferential direction of the body, Disclosed is a disposable diaper.

[3] The stretchable and contractible member according to any one of [1] to [4], wherein the stretchable material in a stretched state is disposed between the layers of the plurality of nonwoven fabric sheets, and the stretchable material is fixed to the plurality of nonwoven fabric sheets Is a disposable diaper as set forth in [1] or [2] above.

[4] The absorbent article according to any one of [1] to [4], wherein the absorbent body is continuously disposed from the crotch covering portion to the frontal covering portion and the rear covering portion, and at least one of the frontal covering portion and the rear covering portion, And a waist-shaped waist portion which is a portion closer to the waist edge than an extension of the step edge, the stretchable and contractible portion is formed, and the ventilating-formed sheet is stacked on the stretchable and contractible portion, The disposable diaper according to any one of [1] to [3], wherein the diaper is joined by the joint formed intermittently toward the circumferential direction.

[5] The absorbent article according to any one of [1] to [4], wherein the absorbent body is continuously disposed from the crotch part to the frontal part and the rear part, and at least one of the frontal part and the rear part, And the stretchable and contractible portion is formed at a portion of the outer periphery of the absorber outside the side edge of the absorber that is the crotch portion that is the crotch side portion of the extension of the end edge and the air passage formed sheet is stacked on the stretchable portion, The disposable diaper according to any one of the above [1] to [4], wherein the forming sheet and the stretching / contracting portion are joined by the bonding portion formed intermittently toward the body peripheral direction.

[6] The absorbent article according to any one of [1] to [5] above, wherein the ventilation-path forming sheet and the stretching / contracting portion are intermittently turned toward the periphery of the trunk by the joint portion continuously formed in the front- Disposable diapers as set forth in one.

[7] The sanitary napkin according to any one of [1] to [5], wherein the ventilation-path forming sheet and the stretching / contracting portion are bonded by the joint portion intermittently formed toward both the body peripheral direction and the longitudinal direction of the disposable diaper Disposable diapers.

[8] The ventilation-passage forming sheet is disposed on at least one skin contacting surface of the frontal and rear-facing portions, and is folded in two folds at the waist edge. At least one outermost surface The disposable diaper according to any one of [1] to [7], wherein the disposable diaper is arranged so as to cover a part of the sheet material constituting the diaper.

[9] The disposable diaper according to any one of [1] to [7], wherein the ventilation path forming sheet is formed by folding in two folds of a sheet material constituting at least one of the front part and the rear part diaper.
[10] A method of manufacturing a disposable diaper having a crotch covering portion for covering the wearer's body and a crotch covering portion for covering the wearer's crotch by disposing an absorbent body and a posterior to-beating portion, wherein a part of the sheet material constituting the post- A step of intermittently joining the sheet material and the nonwoven fabric sheet at an interval of 2 to 50 mm toward the periphery of the body by a linear joining portion extending in the front and back direction of the disposable diaper, Forming a stretchable portion by disposing a waist stretchable material in a stretched state around the waist at the rear portion of the sheet material; Folded into two folds, and two folds made up of two folded portions inside the disposable diaper And a step of fixing the two folded portions in a state in which the folded portion and the stretched and contracted portion are laminated, wherein a part of the skin contact surface of the two folded portions is constituted by a water repellent nonwoven fabric, And the non-joined portion, which is a portion other than the abutting portion of the folded portion, is separated, and the inner space of the disposable diaper and the outer space are communicated with each other Wherein the ventilation passage is formed in the upper surface of the disposable diaper.
[11] The nonwoven fabric sheet is adhered to the double-folded portion of the sheet material so that the nonwoven fabric sheet is unfolded from the edge of the sheet material, and the two-folded portion of the sheet material is folded in two Wherein the waist stretchable material is disposed on the overlapped portion overlapping with the double folded portion and the ventilation passage is formed on the skin contact surface side of the stretchable and contractible portion.
[12] The nonwoven fabric sheet according to any one of [1] to [12], wherein the double folded portion of the sheet material and the double folded portions are folded into two folds, Wherein the waist stretchable material is disposed on a surface of the nonwoven fabric sheet which is intermittently bonded to the folded portion and the overlapped portion, and the waist stretchable material is arranged on the skin bonded surface side and the outer surface side of the stretchable portion, Wherein the disposable diaper is made of a synthetic resin.
[13] The nonwoven fabric sheet is bonded to the overlapped portion overlapping the two folded portions when the two-folded portion of the sheet material is folded in two, and the overlapping portions of the sheet material constituting the posterior covered portion are intermittently Wherein the waist stretchable material is disposed on a surface of the nonwoven fabric sheet bonded to the backing sheet and the air passage is formed on an outer surface side of the stretching and shrinking portion.

The disposable diaper according to the present invention has good air permeability and can be easily manufactured, so that a comfortable wearing feeling can be obtained.

1A is a front view schematically showing an embodiment of a disposable diaper according to the present invention.
Fig. 1B is a schematic plan view schematically showing a state in which the disposable diaper shown in Fig. 1A is developed and viewed from the top sheet direction. Fig.
1C is a schematic cross-sectional view schematically showing a cutting section taken along the line A-A 'of the disposable diaper shown in Fig. 1B.
Fig. 1D is a schematic cross-sectional view schematically showing a cutting section taken along the line B-B 'of the disposable diaper shown in Fig. 1B.
Fig. 1E is a schematic plan view schematically showing a state in which the disposable diaper shown in Fig. 1A is developed and viewed from the direction of the outer sheet.
Fig. 1F is a perspective view schematically showing the vicinity of the elastic member of the disposable diaper shown in Fig. 1A.
1G is a schematic cross-sectional view schematically showing a cutting section taken along line A-A 'of the disposable diaper shown in Fig. 1F.
Fig. 1H is a schematic plan view showing an enlarged view and a schematic representation of the shape of a junction of the disposable diaper shown in Fig. 1A, and shows a state in which folded portions are developed in two folds.
FIG. 2A is a schematic process diagram schematically showing a manufacturing process of the disposable diaper shown in FIG. 1A, and shows each process seen from the direction of the inner sheet.
FIG. 2B is a schematic cross-sectional view schematically showing a cut section taken along the widthwise center of the structural unit shown in FIG. 2A for each step shown in FIG. 2A.
Fig. 3A is a schematic plan view showing an enlarged view and a schematic view of another form of the joint of the disposable diaper, and shows a state in which folded portions in two folds are developed.
Fig. 3B is a schematic plan view schematically showing an enlarged view of still another form of the joint portion of the disposable diaper, and shows a state in which folded portions in two folds are developed.
Fig. 3C is a schematic plan view showing an enlarged and schematically further still another form of the joint portion of the disposable diaper, and shows a state in which the folded portion is developed in two folds. Fig.
Fig. 4A is a schematic process chart schematically showing the manufacturing process of the disposable diaper, and shows each process seen from the direction of the inner sheet.
Fig. 4B is a schematic cross-sectional view schematically showing a cut section taken along the widthwise center of the structural unit shown in Fig. 4A in each step shown in Fig. 4A. Fig.
5A is a schematic process diagram schematically showing the manufacturing process of the disposable diaper, and shows each process seen from the direction of the inner sheet.
Fig. 5B is a schematic cross-sectional view schematically showing a cut section taken along the widthwise center of the structural unit shown in Fig. 5A in each step shown in Fig. 5A.
6A is a perspective view schematically showing an embodiment of the disposable diaper according to the present invention.
Fig. 6B is a schematic plan view schematically showing a state in which the disposable diaper shown in Fig. 6A is developed and viewed from the top sheet direction. Fig.
6C is a schematic cross-sectional view schematically showing a cutting section along the line A-A 'of the disposable diaper shown in Fig. 6B.
FIG. 6D is a schematic cross-sectional view schematically showing a cutting section taken along line B-B 'of the disposable diaper shown in FIG. 6B.
Fig. 6E is a schematic plan view schematically showing a state in which the disposable diaper shown in Fig. 6A is developed and viewed from the direction of the outer sheet. Fig.
7A is a schematic plan view schematically showing another embodiment of the disposable diaper according to the present invention.
7B is a schematic cross-sectional view schematically showing a cutting section taken along line A-A 'of the disposable diaper shown in Fig. 7A.
7C is a schematic cross-sectional view schematically showing a cutting section taken along the line B-B 'of the disposable diaper shown in Fig. 7A.
7D is a schematic cross-sectional view schematically showing a cross section taken along the line C-C 'of the disposable diaper shown in Fig. 7A.
Fig. 7E is a schematic rear view of the disposable diaper shown in Fig. 7A. Fig.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the disposable diaper according to the present invention will be described in detail.

[1] Basic structure of the disposable diaper of the present invention:

The disposable diaper according to the present invention is characterized in that the disposable diaper of the present invention has the embodied portion 2 and the posterior accommodated portion 6 and the absorbent body 22 before being wrapped around the wearer's body such as the disposable diaper 1 shown in Figs. And a crotch portion 4 for covering the wearer's crotch.

[1-1] Disposable Diapers:

The " disposable diaper " includes various forms such as pants type and tape type. However, the present invention widely includes a disposable diaper having specific features, and is not limited to the pants type, the tape type, etc. shown below.

[1-2] Whole and posterior parts:

Quot; and " posterior feces portion " are portions that surround the wearer's body of the disposable diaper.

In the present specification, in the case where the absorbent body is continuously arranged from the crotch part to the posterior part and the posterior part, the end edge of the absorbent body and the extension line of the end edge in the posterior part and the posterior part, The portion on the side of the rim is referred to as a " waist-covered portion ", the edge of the absorbent body and the portion on the crotch side in the extension of the rim are referred to as "

The phrase " wrap around the torso " means that a tubular structure surrounding the wearer's body is formed by a part of the disposable diaper, or a form in which the tubular structure can be formed. As the diaper having the " tubular structure formed therein ", there is a pants-type disposable diaper. Refers to a disposable diaper having a pants shape in which one waist opening 10 and a pair of left and right leg openings 12 are formed in advance, like the disposable diaper 1 shown in Fig. 1A.

The disposable diaper 1 shown in Figs. 1A, 1B, and 1E has a front and a back case 62 and a back case 65 which are joined to each other at opposite sides thereof to form a tubular structure surrounding the wearer's body to be. With respect to this configuration, the tubular structure is formed by the area between the joining portions 7 and 8 of the outer body 16. Therefore, this region will be referred to as the full-incituated portion 2 or the post-incised portion 6.

The disposable diaper 1 shown in Figs. 1A, 1B, 1D, and 1E includes an outer case 16 and a back case 65. As shown in Figs. However, one waist opening and a pair of left and right leg openings may be formed in advance. That is, it is a form of "pants type" that the outer body is not separated in the front and rear but is formed integrally. For example, in the disposable diaper 201 shown in Fig. 6B, the side edges 202a, 202b and the side edges 206a, 206b of the integrally formed outer body 216 are joined to each other to surround the wearer's body Is a form in which a tubular structure is formed. With respect to this configuration, as shown in Fig. 6A, the tubular structure is formed by the area between the joints 207 and 208 in the outer casing 216. [ Therefore, the region is referred to as the pre-incarcerated portion 202 or the post-incarcerated portion 206.

As the diaper having the " shape in which the tubular structure can be formed ", there can be mentioned a disposable diaper of a similar pants type or a tape type.

Quot; similar pants type " refers to a disposable diaper in the form of a disposable diaper 1 shown in Fig. 1A in which a fastener (mechanical fastener or the like) is attached instead of the abutting portions 7 and 8. In this " pant-pants type ", due to the synergistic force of the fastener, a portion covering the front side of the wearer and a portion covering the rear side of the wearer can be detachably engaged with these two side rims. Thus, a tubular structure surrounding the wearer's torso can be formed.

With respect to the diaper as described above, the tubular structure is formed by the area between the fasteners on both side edges of the outer body. Therefore, the region is referred to as a pre-embryo portion or a post-embryo portion.

The "tape type" is a structure in which the adhesive tape 311 is attached so as to extend from the left and right side edges 374a, 374b of the portion covering the back side of the wearer like the disposable diaper 301 shown in Figs. 7A and 7E Refers to a disposable diaper. The tape type has a fastening member (a hook material 348 of a mechanical fastener in the illustrated example) on a base material 350 constituting the fastening tape 311 as shown in Fig. 7E. Therefore, by fixing the fastening member (the loop member 346 of the mechanical fastener forming the front patch 313 in the illustrated example) of the portion covering the front side of the wearer, the tubular structure surrounding the body of the wearer .

The " tape type " does not mean that a tubular structure is formed in advance like the " pants type ". Therefore, the " front cover " and " post cover " in the " tape type " As defined below.

In the case where the diaper body is formed in an hourglass shape (a shape in which the front and rear waist edges are wider and the crotch side is tightened to narrow the width, and the same shape as the outer body 216 shown in Fig. 6B) An area between a straight line connecting the diaper front base points and a front edge of the diaper front is referred to as a " front diaper part ", an area between the straight line that binds the starting points behind the diaper and the waist edge behind the diaper It will be referred to as " post-mortem ".

A separate rear flap 374 is attached to the diaper body 370 at the waist edge 370c side of the diaper body 370 as in the disposable diaper 301 shown in Fig. The diaper main body 370 is provided between the straight line connecting the legs of the diaper crotch side of the front side flap 372 and the waist edge 370d in the case where a separate front side flap 372 is attached, The area between the waist edge 370c and the straight line that connects the starting point of the diaper crotch side of the back side flap 374 is referred to as " posterior shoulder portion ".

When the diaper main body is provided with only the rear side flap, and the front side flap is not laid, the diaper main body is provided between the straight line connecting the base points of the diaper crotch side of the back side flap and the waist edge Quot; waist portion ", and a region where the waist edge and the waist edge are folded so that the waist edge and the waist edge are folded so as to overlap each other is referred to as " front waist ".

[1-3] Crotch Aspiration:

The " crotch portion " refers to a portion of the disposable diaper which covers the crotch of the wearer. In other words, it is the part between the preformed part and the posterior part.

In the crotch part, an absorber for absorbing and retaining excreta is disposed. The constitution of the absorber is not particularly limited, and an absorber used in a conventionally known absorbent article can be used. The specific structure of the absorber will be described later.

In the disposable diaper 1 shown in Fig. 1D, the absorbent main body 14 is arranged so as to extend between the front and rear external bodies 62 and 65 (the joined portion 28). With this configuration, as shown in Figs. 1A, 1B, 1D, and 1E, the front shell 2 is supported by the front shell 62 and the rear shell 6 is partially supported by the back shell 65, 6 is formed by a part of the backing external body 65 and a part of the water absorbent main body 14 so that the crotch portion 4 is formed. The absorbent body 22 is disposed as a constituent member of the absorbent main body 14.

[2] Characteristic constitution of the disposable diaper of the present invention:

The disposable diaper according to the present invention is characterized in that, as in the case of the disposable diaper 1 shown in Fig. 1 (1), 1) a stretchable and contractible portion 80 made of stretchable nonwoven fabric is formed at least in a part of the posterior- 2) a ventilation-formed sheet 82 made of a water-repellent nonwoven fabric is disposed on a portion of the skin-contacting surface of the posterior-receiving portion 6; and 3) the ventilation- The air passage forming sheet 82 and the stretchable and contractible portion 80 are laminated on the stretchable and contractible portion 80 and joined together by the joint portion 84 formed intermittently toward the body peripheral direction.

As shown in Figs. 1F and Ig, the disposable diaper can narrow the distance between the abutting portions 84 of the air-permeable sheet 82 by shrinking the stretchable and contractible portion 80. Fig. As a result, the ventilation path forming sheet 82 is bent and deformed into a wavy shape, so that the ventilation path forming sheet 82 and portions (non-bonding portions) other than the abutting portion 84 of the stretchable and contractible portions are separated from each other to function as a vent pipe and a cushion A vent path 86 is formed.

When the wearer takes a sitting position at a standing position, the diaper is compressed from the outside, and moisture in the internal space of the diaper passes through the air passage 86 and is discharged to the external space. In addition, when the wearer makes a walk, the crotch covering portion of the diaper is deformed by the movement of the legs. Therefore, the moisture in the inner space of the diaper is discharged to the outer space by the deformation, Into the space. Accordingly, the inner space of the diaper can be made a comfortable environment.

Further, the air passage exerts a buffering function like an air cushion. Therefore, unlike the diaper disclosed in Patent Document 1 in which the air permeability is improved only, the skin feel is smooth, and the flexibility around the waist of the diaper can be improved. That is, the wearer can obtain a comfortable fit.

[2-1] Elastic section:

The stretchable and contractible portion is made of a stretchable nonwoven fabric. The "stretchable nonwoven fabric" means that the nonwoven fabric itself has stretchability, or that stretchability is given to the nonwoven fabric by bonding a stretchable material (an elastic material such as rubber or thermoplastic one-raster) to the nonwoven fabric to be a base material.

For example, a commercially available elastomeric nonwoven fabric, a nonwoven fabric made of elastomeric spunbond nonwoven fabric, or the like can be used. Specifically, Strapplex (manufactured by Idemitsu Unitech Co., Ltd.), Sfan Sion (manufactured by KB Seiren Co., Ltd.) and the like can be suitably used. The elastomeric nonwoven fabric and the elastomeric nonwoven fabric nonwoven fabric have elastic properties.

However, it is not always necessary to use a stretchable nonwoven fabric having stretchability as described above. The nonwoven fabric and the stretchable material may be appropriately combined and joined together. That is, the stretchable nonwoven fabric may be arranged such that the stretchable material in the stretched state is disposed between the layers of the plurality of nonwoven fabric sheets, and the stretchable material is fixed to the plurality of nonwoven fabric sheets so that the plurality of nonwoven fabric sheets and the stretchable material act integrally.

Unlike the pants-type absorbent articles of Patent Documents 2 to 6, the stretchable nonwoven fabric in which the nonwoven fabric and the stretchable material act integrally as described above is used. For example, the disposable diaper 301 shown in Fig. 7D is disposed between the layers of the plurality of nonwoven fabric sheets 397, 398 in the vicinity of the waist edge frame 370c of the diaper body 370 and near the waist edge frame 370d. The stretchable member 399 is fixed to the plurality of nonwoven fabric sheets 397 and 398 and the plurality of nonwoven fabric sheets 397 and 398 and the stretchable member 399 are integrally Elastic nonwoven fabric 396 is disposed.

Generally, the disposable diaper has a structure in which a line-shaped stretchable material is disposed between the layers of the nonwoven fabric. Therefore, it is not always necessary to arrange a separate elastic nonwoven fabric 396 like the disposable diaper 301 shown in Figs. 7A and 7D, and a part of the structure of the conventional disposable diaper is used as the elastic nonwoven fabric, You can.

For example, in the disposable diaper 1 shown in Fig. 1D, a stretchable waist stretchable material 42 is placed between the pressing sheet 68 constituting the backing 65 and the outer sheet 66 The waist stretchable material 42 is fixed to the pressing sheet 68 and the outer sheet 66 and the pressing sheet 68, the outer sheet 66 and the waist elastic member 42 integrally move Is used as a stretchable nonwoven fabric. That is, the waist stretchable member 42 and the tummy stretchable member 44 are used as stretching members constituting the stretchable and contractible portion (more specifically stretchable nonwoven fabric).

In the disposable diaper 301 shown in Fig. 7C, a stretchable nonwoven fabric 395 constituting the rear side flap 374 is used as a stretchable portion. The stretchable nonwoven fabric 395 is fixed between the layers of the nonwoven fabric sheets 393 and 394 with a stretchable material 391 in a stretched state therebetween. That is, the stretchable member 391 is used as an elastic member constituting the stretchable and contractible portion.

The stretchable and contractible portion is formed to contract in the body peripheral direction. Means that a stretchable nonwoven fabric is disposed such that a contractive force acts along the body peripheral direction when the stretchable nonwoven fabric is stretched along the body peripheral direction. As a simplest structure, there is a configuration in which a line-shaped stretchable material (waist elastic material 42 in this example) is arranged along the body peripheral direction as in the disposable diaper 1 shown in Figs. 1A, 1D and 1E .

However, the present invention is not limited to the configurations shown in Figs. 1A, 1D, and 1E as long as the elastic nonwoven fabric contracts in the peripheral direction of the body. For example, the stretchable material may be arranged so as to project a convex curve or a concave curve downward with respect to the body peripheral direction.

The forming position is not particularly limited as long as the stretchable and contractible portion contracts in the peripheral direction of the body. For example, as shown in Fig. 1 (d), it is preferable that the stretchable and contractible portion 80 is formed on the waist-shaped portion of at least one of the front portion 2 and the rear portion 6. [ The ventilation path forming sheet 82 is laminated on the stretchable and contractible portion 80 of the waisted portion so that the ventilation path forming sheet 82 and the stretchable and contractible portion 80 of the waisted portion are intermittently It is preferable that they are joined by the formed joint portion 84. Such a structure can form a ventilation structure in the waisted portion of the diaper. Therefore, moisture can be missed from the waisted portion of the diaper, and cushioning can be imparted to the waisted portion of the diaper.

It is also preferable that a stretchable portion is formed on at least one of the front portion and the rear portion of the absorbent body in the widthwise outer edge portion of the absorbent body and the outer edge portion of the absorbent body, . With respect to this aspect, it is preferable that the ventilation path forming sheet is laminated on the stretching portion of the tamper lifting portion, and the stretching portion of the ventilation path forming sheet and the tamping portion are joined by the joint portion intermittently formed toward the body peripheral direction. Such a structure can form a ventilation structure in the tampered portion of the diaper. This configuration is preferable in that the cushioning property can be imparted to the tofu portion of the diaper. In addition, when the ventilation structure is formed in the waisted portion as described above, the ventilation passage of the waisted portion and the ventilation passage of the tampered portion interact with each other to increase the effect of missing the moisture from the inner space of the diaper desirable.

In addition, an absorber having a relatively high rigidity is disposed in the " portion inward in the width direction from the side edge of the absorber ". Therefore, as shown in Figs. 1A and 1E, the tama extensible material 44 is often not disposed at the portion. For this reason, it is preferable that the stretchable and contractible portion is formed at " a portion of the tamper resistant portion that is located on the outer side in the width direction with respect to the side edge of the absorbent body ".

[2-2] Sheet formed by ventilation:

In the disposable diaper of the present invention, as shown in Fig. 1B and Fig. 1D, a ventilation-formed sheet 82 made of a water repellent nonwoven fabric is disposed on a part of the skin contacting surface of the posterior accommodating portion 6. The ventilation-path forming sheet 82 is a sheet for forming a ventilation path around the body of the diaper and serving as a cushion.

The " skin-contacting surface " means the innermost surface of the disposable diaper, which directly contacts the skin of the wearer when the disposable diaper is worn. As the " water-repellent nonwoven fabric ", materials such as the side sheets described later can be used. By using the water repellent nonwoven fabric, it is less likely that the excreted matter adhering to the air-permeable sheet is missing.

The " part " means that there is no need to arrange the ventilation-formed sheet on all of the skin contact surfaces of the posterior projections. There is no particular limitation on the portion where the ventilation-formed sheet is arranged. However, as shown in Fig. 1B, it is preferable to dispose at least the ventilation-formed sheet 82 on the waist-shaped portion of the rear portion 6. As shown in Fig. 7A, in order to cover not less than 60% of the width of the waist edge frame 370c of the diaper body 370, a ventilated sheet (in this example, the top sheet 318, the nonwoven fabric sheet 332, etc.) Stretchable nonwoven fabric 396 are overlapped). As shown in Fig. 1B, it is more preferable to arrange to cover the entire width direction on the side of the waist edge 6c side of the posterior portion 6 as shown in Fig.

The basis weight of the air-permeable sheet is preferably 10 to 50 g / m 2. If it is less than 10 g / m 2, 1) the volume of the sheet is so small that the adhesive for securing the stretchable material penetrates and seeps through the sheet, 2) the sheet strength is lowered and the waist wrapping portion of the diaper is broken when the diaper is pulled up There is a fear of causing inconvenience of the user. On the other hand, if it is more than 50 g / m 2, 1) the rigidity of the sheet is too high, and it becomes difficult to bend in cooperation with the shrinkage of the stretchable material to make it difficult to form a ventilation structure; 2) the volume of the sheet is too large, There is a possibility of deterioration.

In the disposable diaper of the present invention, the ventilation-formed sheet constituted as an independent member is disposed on at least one skin contact surface of the frontal and rearward-facing portions, and is folded at the waist edge so that at least one of the frontal and posterior- (For example, an outer sheet constituting the outer body) constituting the outermost surface of the sheet member. This configuration prevents the edge of the sheet material constituting the outermost surface from being covered and exposed, so that it is possible to prevent the wearing feeling from being deteriorated such that the edge of the sheet is applied to the skin of the wearer to cause irritation or pain .

However, the ventilation path forming sheet need not be constituted as an independent member. For example, for the disposable diaper 301 shown in Fig. 7D, a top sheet 318, a nonwoven fabric sheet 332, or the like to which a stretchable nonwoven fabric 396 is bonded is used as a ventilation formed sheet. The ventilation path forming sheet may be formed by folding two sheets of the sheet material constituting at least one of the front portion and the rear portion. In this configuration, the sheet member constituting the posterior portion and the like is folded in two, and the edge of the sheet member is not located at the edge of the waist edge of the diaper. Therefore, it is possible to prevent a situation in which the wearer feels that the edge of the sheet material corresponds to the wearer ' s skin to cause irritation or pain.

As shown in Figs. 1B and 1D, the folded two-folded portion 88 is a portion closer to the distal end side than the two-folded folded line formed in the waist edge rims 2c and 6c of the air- Means a portion to be fitted on the inner surface side. The two folded portions 88 are stacked on the stretchable and contractible portion 80 to function as a ventilation-formed sheet. For example, a part of the outer sheet constituting the cover sheet or the outer body can be repeatedly formed to be folded in two folds. In the disposable diaper 1 shown in Figs. 1B and 1D, the two folded portions 88 of the outer sheets 63 and 66 are used as the vented sheet 82. Fig.

When a sheet constituting an external body is used as the ventilation-through sheet, two folded portions may be formed as they are (that is, two sheets overlapping each other in the inner sheet and the outer sheet overlapping each other). It is preferable that one of the inner sheet and the outer sheet is made to project out from the other end, and the vacant portion is folded into two folds to form a folded portion. Such a configuration can further improve the air permeability by reducing the number of sheets of the double-folded line portion (that is, the ventilation portion). For example, in the disposable diaper 1 shown in Fig. 1D, the outer sheets 63 and 66 are configured so as to come out from the end portions of the inner sheets 61 and 64, and the hollowed- A folded portion 88 is formed.

The length of the double-folded portion is not particularly limited. However, it is preferable that the length is at least as long as the length of the wiping portion can be covered with the wiping portion. When the length is made to be able to cover the tofu portion, it is preferable because the structure can be reached by the ventilation to the vicinity of the crotch portion having a lot of moisture. Specifically, it is preferable that the length of the portion sandwiched inside the diaper is 20 to 100 mm.

The ventilation path forming sheet may be provided with a hole for communicating the inner space of the diaper with the ventilation path formed by the ventilation sheet. With this structure, moisture flows into the ventilation passage via the hole in the inner space of the diaper, and moisture is discharged to the outer space of the diaper via the ventilation passage.

The " hole " means an opening communicating the inner space of the diaper with the air passage, and its shape is not particularly limited. For example, a shape such as a circle, an ellipse, a polygon (a triangle, a square, etc.) may be mentioned.

Note that the " hole " includes not only an ordinary opening but also a structure capable of opening and closing. For example, it is possible to form a hole having a tongue piece functioning as a valve by forming a slit having a convex shape in its trajectory or a plurality of slits in an intersecting line on an air passage forming sheet. By the tongue-like debris, moisture can be passed while suppressing intrusion of urine or body fluids into the ventilation duct.

The shape of the slit is not particularly limited. Examples of the " slit having a locus convex shape " include a) a slit having a curved portion (inverted U-shaped slit or the like) and b) a slit having a bent portion (inverted V-shaped slit or the like). Examples of the "intersecting plural-line slits" include cross-shaped slits formed by crossing two slits, and d) molded slits formed by crossing three slits.

It is preferable that the hole viewed from the front is formed in the region where the ventilation path is formed in the air-permeable sheet (that is, the region between the bonding portions). Particularly, in the case where the ventilation-channel-formed sheet is formed by the folded portion of the double fold, a hole is formed in the vicinity of the tip portion of the double folded portion, and a portion of the end folded portion of the folded portion, . This configuration is preferable because the hole is forcibly opened by the contraction of the stretchable and contractible portion.

In the above configuration, the hole forcibly opened becomes the end passage of the air passage. Therefore, the moisture in the diaper interior space flows into the air passage from the forcibly opened hole, passes through the air passage, permeates through the formed sheet through the waist edge of the diaper, and is discharged to the external space of the diaper. Such a configuration is preferable in that moisture is easy to flow into the ventilation path and moisture is easily discharged to the outside of the diaper, as compared with a structure in which a hole is formed in the ventilation-formed sheet.

A plurality of holes may be formed in the air passage forming sheet. By forming a plurality of holes, the breathability is improved, and moisture can be easily discharged to the outside of the diaper.

The specific number of " plural " is not particularly limited. The number of holes is preferably from 5 to 200, more preferably from 10 to 100, if the opening area is 0.5 to 10 mm 2. 5 or more, it is possible to obtain a ventilation improving effect. On the other hand, by setting the number to 200 or less, it is possible to effectively prevent the urinary or body fluid from flowing into the ventilator.

It is also one of the preferred forms to allow the agent to adhere to the air-permeable sheet. By adhering the medicine, the medicinal effect based on the medicine can be given to the formed sheet through the ventilation which is in direct contact with the skin of the wearer.

The type of medicament is not particularly limited. (Eucalyptus extract, etc.) having a urease inhibiting activity in addition to those having a moisturizing effect, as well as a disinfectant, an antibacterial agent (eg, edetate acetic acid, chlorinated Benzalkonium, etc.), deodorant (various polyphenol compounds and the like), and the like.

[2-3] Connection:

1F and 1G, the ventilation-path forming sheet 82 is laminated on the stretchable and contractible portion 80 so that the stretchable and contractible portion 80 is stretched in the body peripheral direction Which are intermittently formed in the direction of the arrows.

With this structure, the distance between the abutment portions 84 of the air-permeable sheet 82 can be narrowed following the contraction of the stretchable and contractible portion 80, and the inner space of the diaper and the outer space are communicated with each other around the body of the diaper An air passage 86 is formed. This air passage 86 improves the breathability and flexibility of the diaper. Further, in the case of the above structure, a precise joining technique such as joining the sheets in consideration of the position of the stretchable member 42 like the pants-type absorbent article described in Patent Documents 2 to 6 is not necessary. Therefore, it can be easily produced.

The term " intermittent " means that the joint is discontinuous and intermittently formed. According to the present invention, the gap (interval) between the joint portion of the air passage formed sheet and the joint portion of the stretchable and contractible portion is contracted to form the air passage. Therefore, the distance between the joints is preferably 2 to 50 mm in the width direction of the air-permeable sheet or the like, and particularly preferably 5 to 10 mm.

The term " intermittent " may be intermittent with respect to the body peripheral direction of the diaper. That is, it is not particularly limited whether the joining portion is directed in the front-rear direction (direction orthogonal to the body peripheral direction) and in what shape.

For example, Fig. 1H is an exploded view schematically showing a state in which the folded portion 88 of the disposable diaper 1 shown in Fig. 1b is deployed. In this example, the two folded portions 88 of the outer sheet 66 serving as the ventilation path forming sheet 82 are bonded to the pressing sheet 68, which is one nonwoven fabric sheet constituting the stretchable and contractible portion (stretchable nonwoven fabric) (The joining portion 84).

The joining portion 84 is composed of a double folded portion 88 and a plurality of linear shaped joining portions 90 directed in the forward and backward directions of the pressing sheet 68. In addition, the line-shaped joint portion 90 is formed intermittently toward the periphery of the body of the double-folded portion 88 and the pressing sheet 68.

The configuration shown in Fig. 3B is the same as the configuration shown in Fig. 3A and the configuration of the stretchable portion, and the shape of the joined portion is different. Each of the line-shaped joint portions 90A is formed as an aggregate in which a plurality of dot-shaped joint portions 92a are arranged in a line in the front-back direction of the double-folded portion 88 and the pressing sheet 68.

In the example shown in Fig. 3A, the line-shaped joint portion 90A is oriented in the front-back direction of the folded portion 88 and the pressing sheet 68 in two folds. Therefore, compared to the case where the diaper is oriented toward the body peripheral direction, moisture or the like can easily flow toward the front-back direction, and the exhaust of moisture or the like on the waist edge 6c side of the diaper can be promoted. In addition, it is easy to follow the diaper in a curved shape around the wearer's waist, and is excellent in fit and comfort. Also, the line-shaped joint portion 90A is formed as an aggregate of circular-shaped dot-shaped joint portions 92a. Therefore, it is difficult for the joint 84A, which tends to become hard to touch, to touch the skin to cause pain.

In the present specification, the term " line shape " includes a shape stretching in the front-back direction of the diaper in a broad manner, and includes not only a so-called line shape but also a belt shape and a shape such as a desk. In order for a plurality of dot-shaped joints to be identified as " aggregates ", the distance from adjacent dot-shaped joints is required to be 5 mm or less.

The shape shown in Fig. 3B is the same as the shape shown in Fig. 3A and that of the stretchable portion, and the shape of the joined portion is different. The joining portion 84b is composed of a double folded portion 88 and a plurality of linear shaped joining portions 90b directed in the forward and backward directions of the pressing sheet 68. [ The line-shaped joint portion 90b is intermittently formed toward the peripheral direction of the body of the double-folded portion 88 and the pressing sheet 68. Each of the line-shaped joint portions 90b has n rows in the back-and-forth direction of the double-folded portions 88 and the pressing sheet 68, m rows in the widthwise direction, and n > m And is formed as an aggregate arranged in a satisfactory matrix form. This form is called " n> m ", and more dot-shaped joint portions 92b are arranged in the forward and backward directions with respect to each line-shaped joint portion 90b in the body peripheral direction, Is formed in the shape of a long line.

In the example shown in Fig. 3B, the line-shaped joint portion 90b is formed as an aggregate of circular-shaped dot-shaped joint portions 92b, and the dot-shaped joint portion 92b is formed as an aggregate arranged in a matrix of five rows and two columns .

In the above-described aspect, it is preferable to form the line-shaped joint portions having a width of 1 to 4 mm 2 to 80 mm at 1 to 30 positions in the longitudinal direction. It is preferable that each of the line-shaped junctions is an aggregate in which dot-shaped junctions each having an area of 1 to 4 mm 2 are arranged in matrix form at intervals of 0.2 to 5 mm in the width direction and 0.5 to 3 mm in the longitudinal direction.

3A and 3B, an example in which the line-shaped junction is formed as an aggregate of dot-shaped junctions has been described. 3C, it is preferable that the abutting portion 84c is formed continuously in the front and back direction of the disposable diaper intermittently toward the body peripheral direction (the linear abutting portion 90c) , The configuration of the expansion and contraction portion is the same as that of the configuration shown in Fig. 3A, and the shape of the joint portion is different.

In particular, it is preferable that the vent passage is formed so as to be perpendicular to the body peripheral direction like the abutment portion 84c, and the vent passage is lined in the direction transverse to the waist edge 6c. In this configuration, the vent path communicates the inner space of the diaper with the outer space at the waist edge 6c. Therefore, it is possible to achieve a sufficient ventilation by the chimney effect (the humidifier which can be warmed by the body temperature, and the lighter moisture can be pushed upward by the ventilation due to the difference in density with the outside air).

In the above embodiment, the abutment portion is formed in a line shape extending in the longitudinal direction of the diaper. Therefore, it is preferable that the exhaust of moisture or the like on the waist edge side of the diaper is promoted. In the same way, when a plurality of joint portions are formed in the forward and backward directions, it is preferable that the plurality of joint portions are formed in a line so as to have a straight line shape extending in the forward and backward directions. By forming the joining portion in this way, it becomes easy to form a straight ventilation passage continuous in the front-rear direction of the diaper. Such a structure is preferable in that the formed air passage is hardly collapsed and the air permeability is easily improved.

In the disposable diaper of the present invention, it is preferable that the ventilation-path-formed sheet and the stretchable and contractible portion are joined by a joint portion intermittently formed in both the front and back directions of the body peripheral direction and the back and forth direction of the disposable diaper.

For example, a plurality of dot-shaped joints may be arranged in a staggered manner. Also in this configuration, the air-permeable sheet is bent following the contraction of the stretchable and contractible portion, so that a ventilation path communicating the inner space of the diaper with the outer space is formed. Therefore, the breathability and flexibility in the vicinity of the waist opening, which is an effect of the present invention, can be obtained.

[2-4] Arrangement in the forehead:

In the foregoing description, a configuration in which the ventilation-path forming sheet is disposed in the posterior portion has been described. However, it is also preferable that the same ventilation channel can be formed in the frontal portion in addition to the posteriorly-covered portion.

That is, like the disposable diaper 1 shown in Fig. 1D, 1) a stretchable and contractible portion 80 made of stretchable nonwoven fabric is formed at least in a part of the entire cancellation portion 2, and the stretchable and contractible portion 80 is contracted (2) a ventilation-path forming sheet 82 made of a water-repellent nonwoven fabric is disposed on a part of the skin-contacting surface of the frontal covering part 2, (3) And that the stretchable and contractible portion 80 is joined to the ventilation-formed sheet 82 by the joint portion 84 formed intermittently toward the body peripheral direction. With this configuration, it is possible to obtain the effect of improving the air permeability and the flexibility of the air passage in all directions around the body (both the front and rear ends).

The configuration of the stretchable and contractible portion, the ventilation-formed sheet and the joined portion is not particularly different from that of the posteriorly-wrapped portion even in the frontal portion. Only the point where the placement position is on the front side is different. The disposable diaper 1 shown in Figs. 1A to 1E has a ventilating structure similar to that of the posterior cannula 6 in the frontal portion 2 as well.

[2-5] Specific Embodiment and Manufacturing Method Thereof:

As a specific embodiment of the disposable diaper according to the present invention, there are the following two forms. Hereinafter, the manufacturing method will be described.

[2-5a] First embodiment:

In the first embodiment, as shown in Figs. 1D, 1F and 1G, the skin contact surfaces of the air passage forming sheet 82 and the stretchable and contractible portion 80 are joined to each other at a joint portion 84 formed intermittently toward the body- As shown in Fig. In this example, as shown in Fig. 1 (d), a ventilating-formed sheet 82 (in this example, a two-folded portion 88 of the outer sheet 66) and a first nonwoven fabric The sheet (in this example, the pressing sheet 68) is bonded by a bonding portion 84 formed intermittently toward the peripheral direction of the body of the diaper. The waist stretchable material 42 is fixed in a stretched state between the layers of the first nonwoven fabric sheet and the second nonwoven fabric sheet (the outer sheets 63 and 66 in this example) constituting the outer surface of the stretchable and contractible portion 80, .

In the case of the first embodiment, the vent path 86 is formed on the skin-contacting surface side of the diaper. Such a structure is preferable in that the effect of improving the air permeability and the effect of improving the flexibility due to the formation of the ventilation are easily exhibited. Since the first nonwoven fabric sheet and the air-permeable sheet 82 are sandwiched between the skin of the wearer and the waist stretchable material 42, the waist stretchable material 42 is highly uncomfortable .

The first embodiment can be produced, for example, by the steps shown in Figs. 2A and 2B. Fig. 2A is a process diagram schematically showing a process of manufacturing the disposable diaper 1 shown in Fig. 1D. This figure shows an enlarged view of only the portion corresponding to the vicinity of the waist edge in the posterior portion of one pants-type diaper, depending on the situation in the drawing. In practice, a continuous manufacturing method may be employed. Concretely, it is preferable that the long sheet material and the long stretchable material 42 are fed in the left and right direction of the drawing, and the production is carried out in such a manner that the structural units shown in the figure are continuously repeated in the left and right direction of the drawing. FIG. 2B is a schematic cross-sectional view schematically showing a cutting section taken along the widthwise center of the structural unit shown in FIG. 2A for each step shown in FIG. 2A.

First, as shown in Figs. 2A and 2B, an outer sheet 66 including the air passage forming sheet 82 and a pressing sheet 68 serving as a first non-woven sheet are prepared.

Next, as shown in Figs. 2A and 2B, the pressing sheet 68 is joined to the folded portion 88 of the outer sheet 66 to form the joining portion 84. Fig. At this time, the joining is performed so that the pressing sheet 68 comes out from the edge of the outer sheet 66. In the illustrated example, the joint 84 is formed by heat sealing. The joining portions 84 are formed intermittently in the direction of the body periphery of the diaper (the left and right direction in the figure) continuously in the front-rear direction (vertical direction in the drawing) of the disposable diaper.

In the illustrated example, a laminated sheet in which the inner sheet 64 is laminated is used so that a part (exposed portion 78) of the outer sheet 66 is exposed.

As shown in Figs. 2A and 2B (c), the waist stretchable material 42 is stretched and bonded to the exposed portion 78 of the outer sheet 66. In addition, an absorbent main body 14 is laid. The broken line portion inside this absorbent main body 14 indicates the absorbent body 22. [ In this case, the nonwoven fabric sandwiched between the waist stretchable members 42 is bonded on the continuous surface.

Adhesive of the stretchable material 42 can be achieved by 1) continuously applying hot melt adhesive to the exposed portion 78 of the outer sheet 66 to be the second nonwoven fabric sheet or the pressing sheet 68 to be the first nonwoven fabric sheet, (2) a method in which a hot melt adhesive is applied or sprayed directly on the waist stretchable material 42 and the waist stretchable material 42 is adhered in a stretched state 3) A waist stretchable material 42 is placed in an elongated state on the upper portion of the exposed portion 78 or the pressing sheet 68 serving as the first nonwoven fabric sheet. In this state, hot melt adhesive is sprayed, A method in which a hot melt adhesive is adhered and adhered to both the pressing sheet 68 and the waist stretchable material 42 or 4) the surface of the pressing sheet 68 serving as the exposed portion 78 or the first nonwoven fabric sheet And the waist stretchable member 42 are arranged in a stretched state, By coating an adhesive agent to spray as a continuous, may be performed by a method of adhering the hot-melt adhesive and which adhere to both of the exposed portion 78 or the pressing seat 68 and West new material 42.

The term " continuous coating " in this embodiment includes not only a method of applying an adhesive to the entire surface of the substrate or spraying the coating on the entire surface, but also a coating method in a spiral form. That is, the disposable diaper preferably has a shape in which the joints are continuously formed in the width direction of the disposable diaper. In any of the above-described methods 1) to 4), the joint portion is continuously formed in the width direction of the disposable diaper. Therefore, a continuous ventilator extending in the front-rear direction of the disposable diaper is not formed between the layer of the exposed portion 78 and the pressing sheet 68 constituting the stretchable and contractible portion 80. On the other hand, the air passage is formed between the pressing sheet 68 and the air passage forming sheet 82 (double folded portion 88), and the ventilation is improved by the air passage.

The bonding method 1) can be carried out by a method such as a slit coater (sim coater), a curtain spray method, a spiral spray method, an omega coat method or the like, and the bonding method 2) can be carried out by a method such as a comb, omega coat, 3) and 4) can be carried out by a method such as an omega coat, a summit, or the like. The omega coat is, for example, an omega nozzle head (manufactured by ITW DYNA TEX CORPORATION), and the summit can be performed by using a summit nozzle (manufactured by Nodosha Corporation).

Finally, as shown in Figs. 2A and 2B (d), the double-folded portion 88 of the outer sheet 66 and the pressing sheet 68 bonded to the outer sheet 66 are joined to the waist edge 6c so that the pressing sheet 68 overlaps the exposed portion 78 of the outer sheet 66 and covers a portion of the topsheet 18 at a portion of the pressing sheet 68. [ Is fixed with a hot-melt adhesive. As a result, the stretchable and contractible portion 80 is formed and the waist stretchable material 42 enters between the layers of the stretchable and contractible portion 80.

[2-5b] Second embodiment:

The second embodiment is a form in which the ventilation-path forming sheet is continuously arranged on the outer surface of the stretchable and contractible portion on the skin-contacting surface of the stretchable and contractible portion. And the skin contact surface and the outer surface of the ventilation path forming sheet and the stretchable and contractible portion are joined together by the joint portion intermittently formed toward the body peripheral direction.

In the case of the second embodiment, the ventilation-formed sheet is disposed on both the skin contacting surface and the outer surface of the diaper. Therefore, an air passage is formed in both the skin contact surface and the outer surface of the diaper, and the air passage structure is formed in two layers around the waist. Such a structure is preferable in that the air permeability and flexibility are improved by the air passage on the side of the skin contact surface, thereby improving the touch on the outer surface by the air passage on the outer surface side.

Will be described with reference to Figs. 4A and 4B, which are views of Figs. 2A and 2B. In the following description, the same parts as those in the first embodiment are not described, and the description will be focused on the parts different from those in the first embodiment.

4A and 4B, the outer sheet 66 to be the air passage forming sheet 82a and the nonwoven fabric sheet 76A to be the first nonwoven fabric sheet and the second nonwoven fabric sheet Prepare. In the second embodiment, the ventilation-formed sheet 82a is continuously arranged from the skin-contacting surface to the outer surface of the stretchable and contractible portion. Therefore, compared with the first embodiment, the ventilation-formed sheet 82a, which is long in the diaper front- . Also, a pressing sheet is not used as in the first embodiment.

Then, as shown in Figs. 4A and 4B (b), the nonwoven fabric sheet 76A is successively joined to the double-folded portion 88 from the exposed portion 78 of the outer sheet 66A, ). In the example shown in the drawing, the joint 84D is formed by heat sealing, and the joint 84D is formed intermittently toward the width direction (left and right direction in the figure) continuously in the front-back direction (vertical direction in the drawing) of the disposable diaper have.

As shown in Figs. 4A and 4B (c), the surface of the nonwoven fabric sheet 76A (intermittently bonded to the exposed portion 78 and the folded portion 88 of the outer sheet 66) And the waist stretchable material 42 is placed in a stretched state. In addition, an absorbent main body 14 is laid.

Finally, as shown in Figs. 4A and 4B (d), the folded portions 88 (the nonwoven fabric sheet 76A is joined to the two folds of the nonwoven fabric sheet 76A and the outer sheet 66) Folded at a position corresponding to the waist edge 6c and bonded to the exposed portion 78 (the nonwoven fabric sheet 76A is bonded to the nonwoven fabric sheet 76A and the outer sheet 66). As a result, the stretchable and contractible portion 80 is formed and the waist stretchable material 42 is sandwiched between the layers of the stretchable and contractible portion 80.

[2-5c] Others:

Finally, a description will be given of a configuration in which the ventilation path forming sheet and the outer surface of the stretchable and contractible portion are joined by a joint portion intermittently formed toward the body peripheral direction.

In this case, an air passage is formed on the outer surface of the stretchable and contractible portion. Since flexibility can be imparted to the outer surface of the diaper, a soft touch can be obtained when a person (mother or nurse) who exchanges the diaper comes into contact with the diaper. Further, when the diaper is worn, the waist wrapping portion may fold inside the diaper and enter inside. If the structure as seen in the foregoing is folded and the portion in which the inside is in contact with the skin of the wearer is good per skin, a soft touch can be obtained.

Will be described with reference to Figs. 5A and 5B which are views of Figs. 2A and 2B. In the following description, parts similar to those of the first embodiment and the second embodiment will not be described, and the differences from the first embodiment will be mainly described.

First, as shown in Figs. 5A and 5B (a), an outer sheet 66B to be the air passage forming sheet 82B and a nonwoven fabric sheet 76B to be the second non-woven sheet are prepared. The outer sheet 66B which is long in the front and rear direction of the diaper is used as compared with the first embodiment for covering a part of the top sheet 18 constituting the absorbent main body 14 from a part of the outer sheet 66B.

Next, as shown in Figs. 5A and 5B (b), the nonwoven fabric sheet 76B is joined to the exposed portion (exposed portion 78) of the outer sheet 66B from the inner sheet 64, (84E). In the illustrated example, the joint 84E is formed by heat sealing, and the joint 84E is formed intermittently in the width direction (the left-right direction in the figure) continuously in the front-rear direction (the vertical direction in the drawing) of the disposable diaper have.

As shown in Figs. 5A and 5B (c), a hot melt adhesive is continuously applied to the surface of the nonwoven fabric sheet 76B (bonded to the outer sheet 66B) The absorbent main body 14 is laid.

Finally, as shown in Figs. 5A and 5B (d), a double-folded portion 88 is doubled at a position corresponding to the waist edge 6c to form a nonwoven fabric sheet 76B, an inner sheet 64 And the top sheet 18 in a superimposed manner. As a result, the stretchable and contractible portion 80 is formed and the waist stretchable material 42 enters between the layers of the stretchable and contractible portion 80. In this example, a part of the topsheet 18 of the absorbent main body 14 is covered by the two folded portions 88 of the outer sheet 66B.

[3] Components of disposable diapers:

The disposable diaper of the present invention has at least the absorber 22, like the disposable diaper 1 shown in Figs. 1C and 1D. Normally, in addition to the absorber 22, the topsheet 18, the backsheet 20, and the like are provided as constituent members. In addition, depending on the purpose, other constituent members such as a three-dimensional gathers and various elastic members 42 may be provided.

[3-1] Absorber:

The " absorber " is a structure composed of an absorbent material. It is used for the purpose of absorbing and retaining the urine of the wearer. Examples of the water absorbent material include fluff pulp, super absorbent polymer (hereinafter referred to as "SAP"), and hydrophilic sheet. As the fluff pulp, wood pulp or non-wood pulp may be fizzed on a surface. The SAP may be sodium polyacrylate, and the hydrophilic sheet may be a nonwoven fabric obtained by applying a tissue, an absorbent paper, or a hydrophilic treatment.

As the " absorbent body ", it is preferable to use one or two or more absorbent materials molded into a mat form. The mat may be a single layer or a multi-layer. Among them, 10 to 500 parts by mass of SAP is preferably used in combination with 100 parts by mass of fluff pulp. At this time, the SAP may be mixed in the mat of the fluff pulp, or may be disposed in layers between the layers of the fluff pulp mat. Further, in order to prevent the SAP from coming off and to impart shape stability, it is preferable that the entire absorbent body is covered with the hydrophilic sheet. The absorbent body 22 shown in Figs. 1C and 1D is covered with the entirety of the absorbent body 22 by the hydrophilic sheet-like tissue 54 and the lower tissue 56. Fig.

The " absorber " may be formed into a desired shape such as a spherical shape or an hourglass shape depending on the purpose. For example, the absorber 22 shown in Figs. 1C and 1D is an example using a spherical absorber. 1C and 1D, the surface side thereof is covered with the topsheet 18 and the back side thereof is covered with the backsheet 20, do. That is, the absorber 22 is generally disposed between the topsheet 18 and the backsheet 20.

[3-2] Top sheet:

The " topsheet " is a sheet disposed so as to cover the surface of the absorbent body (the face on the side facing the wearer's skin when the diaper is attached). Permeable material, at least a part (all or a part) of the liquid permeable material is constituted by the liquid-permeable material.

Examples of the liquid-permeable material include a woven fabric, a nonwoven fabric, and a porous film. Among them, it is preferable to use a nonwoven fabric made of a thermoplastic resin such as polypropylene, polyethylene, polyester, aliphatic polyamide or the like, to which hydrophilization treatment is applied.

As the nonwoven fabric, a nonwoven fabric produced according to a manufacturing method such as air through (card hot air), card embossing or the like can be suitably used. The hydrophilizing treatment can be carried out by applying, spraying, or impregnating a surfactant on the raw surface of the nonwoven fabric.

At least a part of the top sheet is made of a liquid permeable material. The position is not particularly limited. However, it is preferable that a portion overlapping the arrangement position of the absorbent body in the crotch covering portion when viewed in a plane is constituted by a liquid permeable material.

Further, in the disposable diaper of the present invention, not all of the surfaces of the wearer's skin facing the skin are covered by the topsheet. For example, as for the tape-type disposable diaper, as shown in Figs. 7A to 7D, a top sheet 318 made of liquid-permeable material is disposed only in the center portion in the body peripheral direction of the diaper. At this time, in many cases, the side sheet 319 made of a breathable and water-repellent material is disposed on the peripheral edge portion (side flap portion) of the diaper. As the breathable and water-repellent material, it is preferable to use a nonwoven fabric sheet obtained by a process such as card embossing, spunbonding or the like. Especially, it is preferable to use a nonwoven fabric sheet such as SMS or SMMS having high water resistance.

[3-3] Back sheet:

The back sheet is a sheet disposed so as to cover the back surface of the absorber (the surface on the side facing the skin of the wearer when the diaper is attached). The back sheet is made of a liquid-pervious material to prevent the urine of the wearer from leaking to the outside of the diaper.

The arrangement position of the back sheet is not particularly limited. It is preferable that the back sheet is arranged so as to cover at least the arrangement position of the absorber from the viewpoint of preventing leakage of urine absorbed by the absorber.

As the liquid-pervious material, for example, a liquid-pervious film made of a resin such as polyethylene may, for example, be mentioned. Among them, it is preferable to use a microporous polyethylene film. This microporous polyethylene film is a film formed with a number of fine pores of 0.1 to several 탆 and permeable to water but has moisture permeability. Therefore, it is possible to prevent the internal space of the diaper from being opened while ensuring the leakproof property.

As for the tape-type disposable diaper, a form in which the cover sheet 324 is brought back to the outer surface side of the back sheet 320 is often used as shown in Figs. 7B to 7E. The cover sheet 324 is used to reinforce the back sheet 320 to make the back sheet 320 feel good.

Examples of the material constituting the cover sheet include woven fabric, nonwoven fabric, and the like. Among them, a dry nonwoven fabric or a wet nonwoven fabric made of a thermoplastic resin such as polyethylene, polypropylene, or polyester is preferably used.

[3-4] Stereoscopic gathering:

The " three-dimensional gathers " are three-dimensionally standing walls that are arranged on the skin contacting surface of the diaper. The leg stretchable material 42 and the upper leg are used for the purpose of preventing the leg from leaking to the side. The solid gathers 26 shown in Figs. 1B and 1C and the solid gathers 326 shown in Fig. 7B are formed by the nonwoven fabric sheets 32 and 332 and between the layers of the nonwoven fabric sheets 32 and 332, The elastic members 42, 36, and 336 are fixed with the three-dimensional gathering elastic members 42, 36, and 33 interposed therebetween. With this structure, the three-dimensional gatherers 26 and 326 rise in three dimensions by the contracting force of the three-dimensional gathering elastic members 42, 36, and 336. Normally, a pair of left and right sides are arranged on both sides of the absorber 22.

The material of the nonwoven fabric sheet is not particularly limited. However, like the side sheet, a nonwoven fabric sheet made of a breathable and water-repellent material can be suitably used. The nonwoven fabric sheet 32 shown in Figs. 1A to 1E and 6B to 6D and the nonwoven fabric sheet 332 shown in Figs. 7B to 7D all use a breathable and water repellent nonwoven fabric sheet.

The nonwoven fabric sheet may be formed as only a three-dimensional gathers, and may be formed of other members of the three-dimensional gathers and the diaper. In the case of the pull-on type disposable diaper, as shown in Fig. 1C, the nonwoven fabric sheet 32 forming the solid gathers is used to attach the absorbent body 14 to the absorbent main body 14, 26) in many cases. On the other hand, in the case of the tape-type disposable diaper, as shown in Fig. 7B, the solid gathers 326 and the side sheets 319 are often constituted by the nonwoven fabric sheet 332 made of water repellent nonwoven fabric.

[3-5] Absorbent Body:

The " absorbent body " is an absorbent pad containing an absorbent body. The absorbent main body is integrated with an external body to be described later to form a disposable diaper. The "absorbent pad" refers to a pad-like member formed integrally with an absorbent body, a top sheet, and a back sheet. A top sheet 18 covering the surface of the absorbent body 22 and a back sheet 20 covering the back surface of the absorbent body 22 and the absorbent body 22 as shown in Figs. 1C and 1D, 22 and the absorbent body 22 is sandwiched between the topsheet 18 and the backsheet 20.

[3-6] External body:

The " outer body " is a structure that covers the body of the wearer. The " outer body " refers to a pants type, which is integrally formed with the absorbent main body, or formed with one waist opening portion and a pair of leg opening portions.

The outer body 16 shown in Fig. 1A has an outer body 62 and a back outer body 65 before covering the body of the wearer. And a pants type integrally formed with the absorbent main body 14 and formed with one waist opening 10 and a pair of leg openings 12. Fig. 6A, the portion covering the wearer's torso and the portion covering the crotch are integrally formed, so that the outer body 216 can be made to have one waist opening 210 and one pair And the leg openings 212 of the pants are formed.

A fastener member capable of engaging can be attached to the external bodies 16 and 216 in place of the joint portions 7 and 8 (the joint portions 207 and 208) so that the fastener members can be engaged with each other, The form in which the members are previously engaged with each other to represent the pants type is also included in the " outer body ". The fastener member may be, for example, a mechanical fastener.

The material of the outer body is not particularly limited. However, it is preferable that the diaper is made of a material having excellent air permeability so as to prevent the opening of the diaper interior space. Examples of the material include nonwoven fabrics made of polyethylene, polypropylene, polyester, and other synthetic fibers.

In many cases, the outer body is composed of two or more nonwoven fabrics joined together. For example, the external body 16 shown in Fig. 1D is composed of two or more nonwoven fabrics (inner sheets 64 and 61, outer sheets 66 and 63, and pressing sheet 68) . The external body 216 shown in Fig. 6D is also constructed of two or more nonwoven fabrics (an inner sheet 215, an outer sheet 217, and a pressing sheet 268), which are laminated together.

It is preferable that various elastic members 42 in the stretched state are fixed between the two or more nonwoven fabric layers. The stretchable material 42 as seen in the foregoing is fixed to the outer body by adhesion using heat and adhesive such as hot melt adhesive or heat sealing such as heat sealing or ultrasonic welding. The external body 16 shown in Fig. 1D is provided between the inner sheet 64 and the outer sheet 66 and between the inner sheet 61 and the outer sheet 63 in the stretched state, 40 and the tummy elastic members 42, 44 are interposed therebetween. The outer body 16 is provided between the layers of the pressing sheet 68 and the outer sheet 66 and between the layers of the pressing sheet 68 and the outer sheet 63 so that the stretchable waist stretchable material 42 is sandwiched between the pressing sheet 68 and the outer sheet 63 As shown in FIG.

[3-7] Diaper Body:

In a tape-type disposable diaper, a two-piece structure of an absorbent main body and an external body is often not pulled out. In a tape-type disposable diaper, a structure in which an absorber and various sheets covering the absorber are integrally formed is referred to as a " diaper body ".Quot; diaper body " is a member exhibiting an absorbing and holding function, which is an essential function of the diaper, because the absorbent body is contained between the layers of various sheets. (A side flap separate from the side sheet, a sealing tape, or the like) that does not contain the absorbent body and does not exhibit the absorbing and holding function is not a constituent member of the "diaper body".

For example, the disposable diaper 301 shown in Figs. 7B to 7D includes a top sheet 318, a side sheet 319, a back sheet 320 and a cover sheet 324 covering the absorber 322 and the absorber 322 The diaper main body 370 is integrally formed. In the disposable diaper 301 shown in Fig. 7A, the fastening tape 311, the front side flap 372 and the back side flap 374 do not constitute the diaper body 370.

[3-8] Various stretchable materials (42):

It is preferable that the disposable diaper of the present invention is provided with an elastic member 42 such as a waist elastic member 42, a leg elastic member 42, and a tummy elastic member 42. Stretchable material 42 or a stretchable material 42 constituting the " stretchable and contractible portion " or the " stretchable nonwoven fabric "

[3-8a] West stretch material (42):

The waist stretchable material 42 is an elastic material 42 disposed on the waisted portion. West gatherers are formed at the waist-shaped portions by the waist stretchable members 42. [

The waist stretchable material 42 is preferably arranged along the waist edge of the diaper. &Quot; thus " means generally parallel to the reference portion. That is, it does not have to be parallel in strict sense. However, the waist stretchable material 42 shown in Fig. 1E is disposed so as to be parallel to the waist edge rims 2c and 6c.

In the case of a pants-type disposable diaper, as shown in Figs. 1A and 1E, a plurality of lines of stretchable linear members 42 are often used as the waist elastic members 42. Fig. In many cases, the waist stretchable material 42 is disposed on both the front portion 2 and the rear portion 6 along the waist edge rims 2c and 6c. On the other hand, in the case of the tape-type disposable diaper, one piece of the stretchable and contractible material 42 (stretchable foam or the like) is often used as the waist stretchable material 42. Further, in many cases, the waist stretchable material 42 is disposed only at the posterior portion along the waist edge of the posterior portion.

[3-8b] Leg extension material (42):

The leg stretchable material 42 is an elastic material 42 disposed on the crotch part. A leg gathers are formed on the crotch portion by the leg stretching member 42. [

In the case of the pull-on type disposable diaper, as shown in Figs. 6A, 6B and 6E, a plurality of line-shaped stretchable members 42 are often used as the leg stretchable members 42, 240. It is often the case that the leg stretching members 42 and 240 are arranged curvilinearly along the outer rim of the leg opening 212 of the external body 216. With respect to this configuration, it is preferable to arrange the leg stretchable material 42 240 and the crotch-containing portion 204 so as not to cross the center in the body peripheral direction as shown in Fig. 6E. According to this configuration, the contraction force of the leg stretching members (42, 240) hardly acts on the center of the crotch portion (204) in the body peripheral direction direction. Therefore, the wrinkles of the absorber 22 are prevented, and the absorber 22 can easily fit into the crotch of the wearer.

The disposable diaper 1 shown in Figs. 1A, 1B and 1E has the leg stretching members 42 and 40 linearly arranged on the crotch portion 4 of the backing 65. The leg stretchable members 42 and 40 are arranged so as to be parallel to the waist edge 6c. The leg stretchable members 42 and 38 are arranged linearly along both side edges of the absorbent body 22 in the absorbent main body 14. [ In this configuration, the leg stretchable members 42, 38, 40 and the tummy stretchable members 42, 44 of the front outer member 62 are integrated to improve fitability of the wearer's legs around the legs.

In addition, when the leg stretchable material 42 is arranged, the diaper is easily worn, and both side edges of the absorbent main body 14 tend to form a shape that is flatter than the absorbent body 22. This configuration makes it easier for urine to collect in the widthwise center portion of the absorbent main body 14 (i.e., the portion where the absorbent body 22 is disposed) after urination. Therefore, it is possible to make the urine dropout difficult to occur.

On the other hand, in the case of the tape-type disposable diaper, as shown in Figs. 7A and 7E, a plurality of line-shaped stretchable members 42 are often used as the leg stretchable members 42, 340. It is often the case that at least the crotch portion 304 is provided with a plurality of left and right linear stretchable members 42 in a straight line along both sides of the absorber 322.

[3-8c] Tama elastic material (42):

The tama extensible material 42 is an extensible material 42 disposed on the tamifield. The TAMI stretch material 42 forms a TAMI Gather on the Tamifield. And is a stretchable material 42 disposed in a pants-type disposable diaper.

In the case of the pull-on disposable diaper, as shown in Figs. 1A, 1B and 1E, a plurality of line-shaped stretchable members 42 are often used as the tummy stretchable members 42, 44. In many cases, the tama elastic members 42, 44 are arranged linearly along the waist edge rims 2c, 6c and in both the front portion 2 and the rear portion 6. It is preferable to arrange the tummy extensible members 42 and 44 so as not to traverse the arrangement region of the absorber 22, as shown in Fig. 1E, for the same reason as in the case of the leg stretchable member 42. [

[3-8d] Construction of stretchable material 42, others:

As the stretchable material 42, a flat rubber made of natural rubber, a threaded rubber made of elastic yarn of synthetic rubber (urethane rubber or the like), and the like can be suitably used. Also, a stretch net, an elastic film, a stretchable foam (foamed synthetic rubber, etc.), or the like may be used.

The stretchable material 42 is preferably fixed in a stretched state of 120 to 400%, and is preferably fixed in a stretched state of 200 to 300%. With this range, a sufficient stretching force can be applied to the wearer without exerting an excessive coupling force. The stretchable material 42 can be fixed by adhesion using an adhesive, or welding using heat or ultrasonic waves. As the adhesive, a hot-melt adhesive or other adhesive having high fluidity can be used. Examples of the welding method include heat sealing and the like.

The method of fixing the stretchable member 42 is not particularly limited. However, a method of fixing an adhesive to at least one of the nonwoven fabric sheets between the stretchable member 42 and the stretchable member 42 by coating or spraying may be used. As a coating method, for example, a spiral coating can be cited.

In the case of the pull-on type disposable diaper, the waist stretchable material 42, the leg stretchable material 42, and the tummy stretchable material 42 are fixed to be sandwiched between layers of a plurality of sheets constituting the outer body, or the like .

For example, the disposable diaper 201 shown in Figs. 6A, 6B and 6E fixes the waist stretchable members 42 and 242 so as to sandwich between the pressing sheet 268 and the outer sheet 217 have. The leg stretchable members 42 and 240 and the tummy stretchable members 42 and 244 are fixed so as to be sandwiched between the inner sheet 215 and the outer sheet 217.

However, the leg stretchable material 42 may be fixed by sandwiching it between layers of a plurality of sheets constituting the absorbent main body.

For example, the disposable diaper 1 shown in Figs. 1A, 1B and 1E may be applied to a nonwoven fabric sheet (not shown) of the same type as a nonwoven fabric sheet 32 (facing the absorbent main body 14 to form a solid garment 26) 32 and the cover sheet 24, the leg elastic members 42, 38 are fixed. The waist stretchable material 42 is fixed to the disposable diaper 1 such that it is sandwiched between the pressing sheet 68 and the layers of the outer sheets 63 and 66. The leg stretchable members 42 and 40 and the tummy stretchable members 42 and 44 are fixed so as to be sandwiched between the inner sheets 61 and 64 and the layers of the outer sheets 63 and 66.

On the other hand, in the case of the tape-type disposable diaper, the waist stretchable material 42 and the leg stretchable material 42 can also be arranged by fixing the sheet so as to sandwich between the layers of the sheets constituting the diaper body.

For example, the waist stretchable material 42 can be fixed so as to be sandwiched between the layers of the top sheet and the cover sheet. 7A, the elastic nonwoven fabric 396 is intermittently joined to the diaper body 370 in the vicinity of the waist edge edges 370c and 370d (the joining portion 386), and the elastic nonwoven fabric 396 (42, 391) constituting the wrist stretchable material (42).

The disposable diaper 301 shown in Fig. 7D fixes the leg stretchable members 42 and 340 so as to sandwich between the side sheets 319 constituted by the nonwoven fabric sheets 332 and the cover sheet 324 have. However, the leg stretching member 42 may be fixed so as to sandwich between the top sheet and the cover sheet layer.

[3-9] Adhesive tape:

The " adhesive tape " is a tape for fixing one of the preformed portion and the postioned portion to the other. (In this example, the side edges 374a and 374b of the diaper body 370) of the backing portion 306, as in the case of the adhesive tape 311 shown in Figs. 7A and 7E, Direction so as to extend outward.

It is preferable that the adhesive tape has a fastening member. The kind of the fastening member is not particularly limited. However, it is preferable to use a mechanical fastener (planar fastener). The mechanical fastener is preferable because the fastening force is high and it is difficult for the fastening force to deteriorate even if the fastening is performed a plurality of times. For example, as shown in Fig. 7E, a hook member 348 of a mechanical fastener is laid near the front end of the base material 350 constituting the fastening tape 311. Fig. On the other hand, in many cases, the front patch 313 made of the loop material 346 of the mechanical fastener is laid on the front cover 302.

The number of the adhesive tapes is not particularly limited. However, a suitable number of adhesive tapes may be laid in accordance with the size of the wearer's body (specifically, around the waist, around the legs, etc.). Generally, one pair of disposable diapers for infants (one left and one right) and two disposable diapers for adults (two left and right sides) are laid.

[Example]

The disposable diaper of the present invention will be described more specifically with reference to the drawings. However, the disposable diaper according to the present invention includes all the disposable diapers having the specific features of the invention, and is not limited to the following embodiments.

[Example 1]

A disposable pull-on diaper was produced as the disposable diaper of Example 1. The specific structure is the structure of the disposable diaper 1 shown in Figs. 1A to 1E. This disposable diaper 1 is of an L size for infants and has an anteroposterior length of 485 mm and a width of the front cannulated portion 2 and the posterior cannulated portion 6 (between the side edges 2a and 2b, between the side edges 6a and 6b ) Is 325 mm. The manufacturing method was performed by the process shown in Figs. 2A and 2B.

1D, the ventilation-passage forming sheet 82 is disposed only on the side of the skin-contacting surface of the stretchable and contractible portion 80, and the ventilation-formed sheet 82 (see Fig. 1D) Is joined to the pressing sheet 68 which is one of the nonwoven fabrics constituting the stretchable and contractible portion 80 and the bonding portion 84 is intermittently moved toward the width direction of the ventilation path forming sheet 82 and the pressing sheet 68 . The waist stretchable material 42 is stretched between the pressing sheet 68 and the layers of the outer sheets 63 and 66 which are the other nonwoven fabric constituting the stretchable and contractible portion 80. The ventilation path forming structure is disposed not only on the back side 6 of the diaper but also on the front side 2 side.

1F, the ventilation path forming sheet 82 is composed of an outer sheet 62 and an outer sheet 63 constituting the back sheet 65, as shown in Figs. 1F to 1H, , 66 are used. A spunbonded nonwoven fabric having a basis weight of 19 g / m 2 is used for the air passage forming sheet 82.

One end of each of the outer sheets 63 and 66 is folded in two on the side of the top sheet 18 with respect to the waist edge 2c and 6c so that the folded portion 88 . The length of the double folded portion 88 in the front-back direction is 80 mm.

A pressing sheet 68 is laminated on the outer sheets 63 and 66 constituting the posterior portion 6 to form the stretchable and contractible portion 80 as shown in Fig. A waist stretchable material 42 is disposed between the layers of the stretchable and contractible portion 80.

As the pressing sheet 68, a nonwoven fabric sheet separate from the inner sheets 61, 64 and the outer sheets 63, 66 is disposed. As the pressing sheet 68, a spun bond nonwoven fabric of the same kind as that of the air passage forming sheet 82, that is, a water repellent nonwoven fabric having a basis weight of 19 g / m 2 is used.

As shown in Fig. 1D and Fig. 1F, the tip of the pressing sheet 68 is configured so as to come out from the tip of the folded portion 88 in two folds. And a portion of the topsheet 18 constituting the absorbent main body 14 is covered with the portion from which the absorbent body 14 is removed. Is formed so as to cover only a portion of 25 mm from the end of the topsheet 18, and is configured to exceed 35 mm from the end of the ventilation-

The pressing sheet 68 has a length of 80 mm (dimension in the front-back direction of the diaper), and the folding portion 88 is joined to the pressing sheet 68 in two folds. The joint portions 84 are arranged at intervals of 7 mm toward the width direction of the two folded portions 88. As shown in Fig. 1F, the joining portion 84 is formed of a plurality of linear-shaped joint portions 90, which are directed in the front-rear direction of the folded portion 88 and the pressing sheet 68 in two folds. The line-shaped joint portion 90 is intermittently formed in the width direction of the folded portion 88 and the pressing sheet 68 in two layers.

Each of the line-shaped joint portions 90 is formed as an aggregate in which a plurality of dot-shaped joint portions 92 are arranged in a line in the front-rear direction of the double-folded portion 88 and the pressing sheet 68. The area of one dot type junction was 4.6 mm 2. The shape of the dot-shaped joint portion 92 is a race track shape in which a semicircle having a diameter of 1 mm is connected to both ends of a sphere having a width of 1 mm and a length of 1.5 mm, and the interval in the longitudinal direction (direction perpendicular to the width direction) 0.5 mm. The aggregate of the five dot-shaped joints 92 is constituted as one line-shaped joint 90 such that the line-shaped joint 90 has a double-folded portion 88 and 2 mm Respectively.

1D, a waist stretchable material 42 is stretched along the waist edge rims 2c and 6c between the layers of the stretchable and contractible portion 80 in an elongation state of 300% elongation (three times the original length) Respectively. As the waist stretchable material 42, a flat rubber (thickness 0.35 mm x 0.65 mm) made of natural rubber was used.

[Example 2]

A disposable pull-on diaper was produced as the disposable diaper of Example 2. The structure of the disposable diaper 201 shown in Figs. 6A to 6E is specifically described. This disposable diaper 201 has the same size as that of the disposable diaper according to the first embodiment, that is, the longitudinal length is 485 mm, and the width of the rear portion 6 (length between the side edges 6a and 6b) is 325 mm.

The absorbent main body 14 used the same structure as the disposable diaper of the first embodiment. The external body 216 was not a front-back separation type like the disposable diaper of Example 1, but an integral body in which a front body part, a crotch part and a posterior part were integrally formed was used. The leg stretching members 42 and 240 disposed on the external body 216 are provided on the leg opening portions of the external body 216 212). &Lt; / RTI >

The rest of the configuration is the same as that of the disposable diaper of the first embodiment. That is, the configuration (the dimensions of each part, the material used, etc.) of the stretching part and the joining part, the forming method, and the like are configured in accordance with the disposable diaper of the first embodiment. Hereinafter, this will be described in detail.

The ventilation path forming sheet 282 is disposed only on the side of the skin contacting surface of the stretchable and contractible portion 280 and the ventilation path forming sheet 282 is disposed on the stretchable and contractible portion 280. In the disposable diaper 201 shown in Figures 6B and 6D, Which is a nonwoven fabric constituting the ventilation path forming sheet 282 and the pressing sheet 268. The connecting portion 284 is intermittently formed in the width direction of the ventilation path forming sheet 282 and the pressing sheet 268. [ The waist stretchable members 42 and 242 are arranged in a stretched state between the pressing sheet 268 and the outer sheet 217 which is another nonwoven fabric constituting the stretchable and contractible portion 280. [ The ventilation path forming structure is disposed not only on the side of the posterior portion 206 of the diaper but also on the side of the frontal portion 202.

6D, the ventilation-path forming sheet 282 uses the folded portion 288 of the outer sheet 217 constituting the external body 216 in two layers. A spunbonded nonwoven fabric having a basis weight of 19 g / m < 2 > is used for the air passage forming sheet 282.

With regard to the disposable diaper 201, one end of the outer sheet 217 is folded in two on the side of the topsheet 18 with respect to the waist edges 202c and 206c to form a folded portion 288 in two folds have. The length of the double folded portion 288 in the front-back direction is 80 mm.

A pressing sheet 268 is laminated on the outer sheet 217 constituting the posterior portion 206 to form the stretchable and contractible portion 280 as shown in Fig. A waist stretchable material 42 is disposed between the layers of the stretchable and contractible portion 280.

As the pressing sheet 268, a nonwoven fabric sheet separate from the inner sheet 215 and the outer sheet 217 is disposed. As the pressing sheet 268, a spun bond nonwoven fabric of the same kind as that of the air passage forming sheet 282, that is, a water repellent nonwoven fabric having a basis weight of 19 g / m 2 is used.

As shown in Fig. 6D, the tip of the pressing sheet 268 is configured so as to come out from the tip of the folded portion 288 in two layers. And a portion of the topsheet 18 constituting the absorbent main body 14 is covered with the portion from which the absorbent body 14 is removed. Is formed so as to cover only a portion of 25 mm from the end of the topsheet 18 by being configured to exceed 35 mm from the end of the ventilation-formed sheet 282. [

The pressing sheet 268 is joined to a folded portion 288 in two folds with respect to the pressing sheet 268 by using a material having a length of 80 mm (dimension in the front-rear direction of the diaper). The joining portions 284 are arranged at intervals of 7 mm toward the width direction of the double folded portions 288. The joining portion 284 is formed as a plurality of linear joining portions facing the front and rear direction of the folded portion 288 and the pressing sheet 268 in the same manner as the joining portion 84 shown in Fig. The line-shaped joint portion is intermittently formed in the width direction of the folded portion 288 and the pressing sheet 268 in two layers. The concrete shape of the line-shaped joint is as described in the first embodiment.

6D, the waist stretchable members 42 and 242 extend along the waist edge rims 202c and 206c between the layers of the stretchable and contractible portion 280 at an elongation of 300% (three times the original length) Six are arranged in a state. As the waist stretchable members 42 and 242, a flat rubber (thickness 0.35 mm x 0.65 mm) made of natural rubber was used.

[Example 3]

As a third embodiment, a tape-like disposable diaper 301 shown in Figs. 7A to 7E was produced. This tape-type disposable diaper 301 is of an L size for infants and has a shape of a sphere having a length of 485 mm in the fore and aft direction of the diaper body 370 and a width of 230 mm.

The diaper main body 370 is provided with a rear side flap 374 made of a stretchable nonwoven fabric 395 so as to extend from the side edges 370a and 370b. As the nonwoven fabric sheets 393 and 394 constituting the stretchable nonwoven fabric 395, a polypropylene spunbonded nonwoven fabric having a basis weight of 18 g / m 2 was used. 10 elastic rubbers were arranged as a stretchable material 42, 391 between the two layers of the spunbonded nonwoven fabric at a pitch of 5 mm and fixed in a stretched state of 300% to constitute a stretchable nonwoven fabric 395.

The length of the side flaps 374a and 374b in the vertical direction is 60 mm and the length in the vertical direction of the side edges 370a and 370b of the diaper body is 108 mm. The length in the left-right direction from the side edges 370a and 370b of the diaper body 370 is 80 mm.

On the skin contact surface of the rear side flap 374, the ventilation passage forming sheet 383 is intermittently bonded to the diaper around the body of the diaper. The air ventilation-formed sheet 383 was made of a spunbonded nonwoven fabric, and a nonwoven fabric made of polypropylene having a basis weight of 18 g / m 2 was used. The air passage forming sheet 383 was bonded to the skin contacting surface of the back side flap 374 from the ultrasonic seal. More specifically, the joining portion 385 is formed by collectively forming a plurality of spherical joints each having a width of 1 mm and a length of 10 mm, and the spherical joints are arranged at intervals of 50 mm in the longitudinal direction of the diaper, 8 Mm intervals.

The stretchable nonwoven fabric 396 was intermittently bonded to the skin contact surface in the vicinity of the waist edge rim 370c and 370d of the diaper body 370 toward the body periphery of the diaper. The nonwoven fabric sheets 397 and 398 ), A water repellent SMS nonwoven fabric sheet having a basis weight of 15 g / m < 2 > was used. Between the layers of the nonwoven fabric sheets 397 and 398, 10 yarn rubbers were fixed as extensible materials 42 and 399 at a pitch of 5 mm and fixed in a stretched state of 300%.

The elastic nonwoven fabric 396 is bonded to the skin contact surface in the vicinity of the waist edge 370c and 370d of the diaper body 370 from the ultrasonic seal (joining portion 386). That is, a portion near the waist edges 370c and 370d of the diaper body 370 (waist-containing portion) was used as the ventilation-formed sheet 383. The joining portion 385 is formed by arranging a plurality of spherical joint portions each having a width of 0.4 mm and a length of 10 mm at intervals of 1 mm in the longitudinal direction of the diaper and at intervals of 7 mm in the width direction of the diaper .

A pair of adhesive tapes 311 were joined to the side edges 374a and 374b of the rear side flap 374 so as to extend outward from the side edges 374a and 374b by 27 mm. The length of the adhesive tape 311 was 40 mm (length in the vertical direction of the rear side flap 374) and length 42 mm (length in the lateral direction of the rear side flap 374). The side flap 374 and the rear side flap 374 so as to overlap each other in the range of 15 mm. The bonding method was a bonding with a hot-melt adhesive.

The adhesive tape 311 is formed by bonding a hook material 348 having a width of 15 mm (the length in the left and right direction of the adhesive tape 311) to the base 350 in the range of 7 to 22 mm inward with respect to the side edge thereof Respectively.

Incidentally, in the disposable diaper 301 of the third embodiment, the front side flap 372 is laid on the front flap 302 side. The entire side flap 372 was fixed with a portion of 20 mm width sandwiched by the cover sheet 324 with a side sheet 319 and adhered with a hot melt adhesive. A portion exposed to the outside from the side edges 370a and 370b of the diaper body 370 is formed in the shape of an isosceles bar of 40 mm on the upper floor and 60 mm on the lower side and the lower floor is provided on the waist edge of the diaper body 370 2c in the range of 15 to 75 mm. The same material as that of the rear side flap 374 was used.

(Industrial availability)

The disposable diaper according to the present invention can be used as a disposable diaper for adults or an adult such as an elderly person or a disabled person requiring nursing care, more specifically as a pull-on disposable diaper or a tape-type disposable diaper.

1: disposable diaper, 2: front cover, 2a, 2b: side edge,
2c: waist edge, 4: crotch covering part, 6: posterior covering part,
6a, 6b: side edge, 6c: west edge edge,
7, 8: joint, 10: waist opening,
12: leg opening, 14: absorbent body,
15: Inner sheet, 16: Exterior body,
17: outer sheet, 18: top sheet,
20: back sheet, 22: absorber,
24: cover sheet, 26: steric gathers,
28: abutment, 32: nonwoven sheet,
36: the elastic gathering material 42,
38, 40: a leg stretching member 42, 42: a waist stretchable member 42,
44: Tama elastic material (42), 54:
56: low tissue, 61, 64: inner sheet,
62: front outer case, 63, 66: outer sheet,
65: back outer member, 66A, 66B: outer sheet,
68: press sheet, 76A, 76B: non-woven sheet,
78: exposed portion, 80: stretchable portion,
82, 82A, and 82B: sheets formed by ventilation,
84, 84A, 84B, 84C, 84D, 84E: joint,
86: vent, 88: double folded,
90, 90A, 90B, 90C: Line type junction,
92, 92A, 92B: a dot-shaped junction,
201: disposable diaper, 202: front cover,
202a, 202b: side frame, 202c: west end frame,
204: crotch part, 206: posterior part,
206a, 206b: side frame, 206c: West frame,
207, 208: junction, 210: waist opening,
212: leg opening, 214: absorbent body,
215: Inner sheet, 216: External body,
217: outer sheet, 240: leg stretchable material 42,
242: West stretchable material 42, 244: Tummy stretchable material 42,
268: pressing sheet, 280: stretching part,
282: ventilation-formed sheet, 284: joint,
288: doubled fold, 301: disposable diaper,
302: Whole-body aspirate, 304: Crotch-like aspirate,
306: After-wrap portion, 311: Adhesive tape,
313: front patch, 318: top sheet,
319: side sheet, 320: back sheet,
322: absorber, 324: cover sheet,
326: steric gathers, 332: nonwoven sheet,
336: a stretchable elastic material (42), 340: a leg stretching material (42)
342: West stretchable material 42, 346: Loop material,
348: hook material, 350: base material,
370: diaper body, 370a, 370b: side edge,
370c, 370d: West end rim,
372: front side flap, 374: rear side flap,
374a, 374b: side edges, 383: ventilated sheet,
385, 386: joining portion, 391: stretchable material 42,
393, 394: nonwoven fabric sheet, 395, 396: stretchable nonwoven fabric,
397, 398: nonwoven fabric sheet, 399: stretchable material (42).

Claims

And a crotch covering portion for covering the crotch of the wearer with a covering portion and a covering portion and an absorbent body disposed before the covering of the wearer's body,
Wherein at least a stretchable portion made of a stretchable nonwoven fabric is formed on at least a part of the rear end portion so that the stretchable and contractible portion is formed to contract in the body peripheral direction,
Wherein a ventilation-formed sheet made of a water-repellent nonwoven fabric is disposed on a part of the skin-contacting surface of the after-
Wherein the ventilation path forming sheet is laminated on the stretchable and contractible portion,
Wherein the ventilation path forming sheet and the stretchable and contractible portion are joined by a joint portion formed intermittently toward the body peripheral direction,
Wherein the abutment portion is formed in a line shape extending in the longitudinal direction of the disposable diaper,
Wherein a distance between the abutting portions is 2 to 50 mm toward the width direction of the air-
The airtightly-formed sheet is deformed into a wavy shape due to the contraction of the stretchable and contractible portion, so that the airtightly-formed sheet and the non-bonded portion, which is a portion other than the abutting portion, of the stretchable and contractible portion are separated from each other, Wherein a ventilation passage communicating with the space is formed.

The method according to claim 1,
Wherein at least a portion of the frontal covering portion is formed with a stretchable portion made of a stretchable nonwoven fabric so that the stretchable and contractible portion is formed to contract in a circumferential direction of the body,
Wherein a ventilation-formed sheet made of a water-repellent nonwoven fabric is disposed on a part of the skin-contacting surface of the pre-
Wherein the ventilation path forming sheet is laminated on the stretchable and contractible portion,
Wherein the ventilation path forming sheet and the stretchable and contractible portion are joined by the joint portion formed intermittently toward the body peripheral direction.

The method according to claim 1 or 2,
Wherein the stretchable and contractible portion is disposed between the layers of the plurality of nonwoven fabric sheets and the stretchable material is secured to the plurality of nonwoven fabric sheets so that the plurality of nonwoven fabric sheets and the stretchable and contractible material act integrally Disposable diapers.

The method according to claim 1 or 2,
Wherein the absorbent body is continuously disposed from the crotch part to the front part and the rear part,
Characterized in that the stretchable portion is formed on at least one of the front portion and the rear portion which is a portion of the waist end portion closer to the edge than the edge of the absorbent body and the extension of the end edge diaper.

The method according to claim 1 or 2,
Wherein the absorbent body is continuously disposed from the crotch part to the front part and the rear part,
Wherein at least one of a front edge of the absorbent body and a portion of the front edge of the absorbent article which is a crotch side portion of an extension of the end edge in at least one of the front flap portion and the rear flap portion, And the stretchable and contractible portion is formed.

The method according to claim 1 or 2,
Wherein the ventilation path forming sheet and the stretchable and contractible portion are intermittently joined to the body peripheral direction and also by the joint portion continuously formed in the front and rear direction of the disposable diaper.

The method according to claim 1 or 2,
Wherein the ventilation path forming sheet and the stretchable and contractible portion are joined by the joint portion formed intermittently toward both the body peripheral direction and the forward and backward directions of the disposable diaper.

The method according to claim 1 or 2,
Wherein the ventilation path forming sheet is disposed on at least one skin contact surface of the frontal and rearward-facing portions and is folded in two folds at the waist edge so as to form at least one outermost surface of the frontal portion and the rearward- And is arranged to cover a part of the sheet material.

The method according to claim 1 or 2,
Wherein the ventilation path forming sheet is formed by a folded portion of two sheets of sheet material constituting at least one of the front portion and the rear portion.

A method for manufacturing a disposable diaper having a crotch covering portion covering a body of a wearer and a crotch covering portion covering a crotch of a wearer with an absorbent disposed thereon,
Wherein the nonwoven fabric sheet is disposed so as to cover a part of the sheet material constituting the after-wrapped portion, and the sheet material and the nonwoven fabric sheet are bonded to each other in the longitudinal direction of the disposable diaper, At intervals of a predetermined distance,
A step of forming a stretchable portion by arranging a waist stretchable material in a stretched state around the waist at the rear portion of the sheet material;
The sheet material is folded in two into the inside of the disposable diaper at a position where it becomes the waist edge of the after-
And a step of fixing the two-folded portion in a state where the two folded folded portions are folded in two folds inward of the disposable diaper and the stretched and contracted portions are laminated,
Wherein a part of the skin contact surface of the double folded portion is constituted by a water repellent nonwoven fabric and a portion constituted by the water repellent nonwoven fabric folded into the double folded portion due to the contraction of the stretchable portion is bent and deformed into a wavy shape, Wherein the non-joined portion which is a portion other than the abutting portion of the disposable diaper is spaced apart from the abutting portion of the disposable diaper so as to form an air passage communicating the inner space and the outer space of the disposable diaper.

The method of claim 10,
The nonwoven fabric sheet is joined to the portion of the sheet material which is folded in two folds so that the nonwoven fabric sheet is projected out of the edge of the sheet material,
The waist stretchable material is disposed on the overlapping portion overlapping the folded portion when the folded portion of the sheet material is folded in two,
Wherein the air passage is formed on the skin contact surface side of the stretchable and contractible portion.

The method of claim 10,
Wherein the nonwoven fabric sheet is bonded to the overlapping portion overlapping with the double folded portion when the double folded portion of the sheet material and the double folded portion are folded in two,
The waist stretchable material is disposed on the double folded portion of the sheet and the surface of the nonwoven fabric sheet intermittently joined to the overlapping portion,
Wherein the air passage is formed on the skin contact surface side and the outer surface side of the stretchable and contractible portion.

The method of claim 10,
The nonwoven fabric sheet is bonded to the overlapping portion overlapping with the double folded portion when the double-folded portion of the sheet material is folded in two,
The waist stretchable material is disposed on the surface of the nonwoven fabric sheet intermittently bonded to the overlapping portion of the sheet material constituting the posterior wrapped portion,
And the air passage is formed on the outer surface side of the stretchable and contractible portion.